The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 22, 1989
Filed:
Oct. 28, 1988
Robert S Meijer, San Diego, CA (US);
Fisher Scientific Company, Pittsburgh, PA (US);
Abstract
A highly efficient switching regulator for a field effect transistor employed in a regulated power supply as the switching element for an unregulated power source. The emitters of a pair of complementary control transistors are coupled to the gate of the field effect transistor, while the bases of each of the control transistors are coupled to a driver circuit. The driver circuit includes a switch operated by a control unit that senses the level of the output voltage of the regulated power supply and constant current circuit. The control transistors are connected for Class C operation, so that only one control transistor is conductive at any time. A charging capacitor charged from the unregulated voltage source is coupled to the gate of the field effect transistor when one of the control transistors is conductive, causing the field effect transmission to be conductive. The field effect transistor is turned off by the other control transistor becoming conductive thereby shorting the gate of field effect transistor to the unregulated voltage supply.